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Have you ever faced this ? ... You have your statspack report ready & are trying to work with your Statspack analyzer tool, which performs statspack report analysis & generates an html file, which is more understandable to non-DBA's too (with some charts, top-queries, recommendations, etc.) . At this moment, either your analysis tool gives up, or the website which you used for analysis, is unavailable (recently happened with oraperf, which we used) !A solution to this, for a DBA, is to be able to read through the statspack report & identify the key areas, issues of importance . This place offers a simple statspack survival guide, to help understand the report. Hope this helps a DBA in speedy statspack analysis, instead of depending on a tool that is not working, or giving erratic results.

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Scenario:Oracle is installed on a Linux server newly & another ftp user wants to just use sqlplus also.Just setting the ORACLE_HOME, LD_LIBRARY_PATH, ORACLE_SID, PATH in the user's profile did not let him run the "sqlplus" command at all. The error shown was :$ sqlplus ld.so.1: sqlplus: fatal: /app/oracle/product/10.2/lib/libsqlplus.so: Permissiondenied Killed The files under "lib" directory under home didn't have permission for anybody other than "oracle" user. -rwxr-x--- 1 oracle oinstall 1320016 Jun 28 2005 /app/oracle/product/10.2/lib/libsqlplus.so When we permit the other users (other than oracle) to read/execute…

How many times have you thought of calculating HWM (high watermark) of a tablespace as a DBA ? Have you ever found out that a tablespace is overallocated in a database, as compared to the data being used in it ? In such a case, you'd want to reduce the wasted space & resize the tablespace to a smaller size, although greater than the current usage. HWM is at the maximum blocks ever occupied by a SEGMENT (unless we perform a truncate on it). Segments span over datafiles however remain within a tablespace. All segments are physically allocated by way of extents, which are contiguous blocks of data. Now, when we talk about contiguous blocks, 2 datafiles (even from same tablespace) are highly unlikely to have contiguguos data blocks. Hence, theoretically, it's possible to calculate high watermark within a datafile, not a tablespace directly, as the latter is only a logical unit. Although, we can resize a tablespace, however the resize value needs to be based on exact calculati…

Problem: OCI client spins when machine uptime >= 249 days in Linux machines. Once the uptime crosses 249 days the database client hangs and leads to high CPU utilization and server hung state. The user will not be able to connect to the databases This is oracle known bug 4612267.

Solution: This can be handled by applying the patch 4612267.

The patch has been applied in the servers server126, server041 & server120 and tested. After the patch has been applied the client connections were normal after 249 days and all the operations of databases/applications were normal and didn’t encounter any problems.

For further information refer the Metalink Notes

Note: 338461.1: SQL*Plus With Instant Client 10.2.0.1 Hangs, When System Uptime Is More Than 248 Days